LUVTruck.com

just put a 400 sbc in my 1980 K10 and was wondering if a tbi conversion is worth it....my buddies all say that it is but they all drive bmws and powerchokes

it has advantages when off roading due to fuel starvation on various angles, tbi won't die out when you have it tipped at large angles.

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I think it's worth it from a mileage standpoint. My TBI suburban gets approximately 5 mpg better than any of the carbed trucks I have had...

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FIAA!

SFPP!

dont do it!lol I got a 93 z71 355 headers small cam and intake and the computer and tbi dont like it not enough fuel. It probably wont run that well on a 400 without a ported tbi with bigger injectors. plus hp!!!!!!! Carb to me has always smashed alot harder!lol but is is nice just to start it up without flooding or popping outta a carb. Mine would probably run better if it had stock size tires so it doesnt put such a load on my high gears. just my .02 lol

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6.0l ls1 swap th350

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I get 5 mpg with my Chevy crew cab BBC pickup with TBI on a good day!!!!!!

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And 0 with a carb sounds about right...

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FIAA!

SFPP!

That sounds about right!!! Back in 1989 my dad bought a brand new Chevy dually with a BBC TBI. At first he would get around 6-7 then it would get worse. He would take to the dealer and Chevy would have a bulletin saying that if you got 5 mpg that was considered good. And the worse the mileage got the lower the mpg got on the bulletin. That was a good way to cure the problem!!!

_________________
Life is a DRAG RACE!!!
I like my Luv WILD!!!

Sometimes too much to drink isn't enough!!
Kinky is using a feather. Perverted is using the whole chicken.
http://www.wildluvracing.com

i dont drive the truck on the road much, just around the farm and in the woods, maybe ill just put a better carb on it

yeah save the hassle of wires all over/sensors go get you a new edelbrock!

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6.0l ls1 swap th350

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TBI with the proper mods and chip will make just as much power as a carb, and make equal to or more MPG. The TBI is a wonderful system, it had quite a bit of learning capability (about 15%) for its time. The biggest factor is knowing your engines airflow requirements at different RPMS and loads. This is what they base the chip program on. A custom chip runs about 250 dollars if you want to buy one, or you could program one yourself if you have programming experiance for alittle under 75$.

A.j.

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if you want to go tbi go with a older motor. You can read anywhere that the heads and tbi intake on 87-95 engines are the worst flowing gm has ever produced and stock tbi only flow like 420 cfm. I would get a set of vortec heads small cam bored tbi and performer intake then go for a custom chip.

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6.0l ls1 swap th350

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also cost is a factor for you being a farm truck. bores tbi $300 heads$??? used about $350 intake$300 chip $300 theres over 1200 dollars when u can just get a new 300 carb!

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6.0l ls1 swap th350

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I dont understand what people keep saying about TBI being good, I have had a couple rigs that run TBI and compared to MPI you might as well not waist the time getting the TBI setup, but thats just me, as i see it if you do it right; then you can get a decent carb tuned right with the right follow up work(cam, intake P/p, headers, heads, ect... ) but really like stated before if you dont plan on doing much but driving it around a farm, just make it work right, and dont dump alot of money into it unless it has some sentimntal value then i say dump loads of cash it it all you want

-Dustin

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My LUV - R.I.P. 1979-2009, you will not be forgotten...

i dunno, I guess everybody has there opinion. and thats the nice part about a forum as such, you can voice your thoughts openly. For a farm truck I can see where TBI would be kinda pointless. But for an excellent running high performance engine, particularly ones that travel alot (high altitudes - different enviroments) the TBI is hard to beat with its own ability to adjust itself - try going from sea level to Denver with a Holley or edelbrock - better bring a tuneup kit with you.
As an employee of a fuel injection service shop - I have seen the standard GM TBI unit make some serious power on turbo powered cars. It is true that Fuel injection can be costly, but really its not. Flow numbers dont need to be the original simply - you need to know them for your combination. things you should know anyways if your doing a proper high performance motor. I myself will pit a properly built TBI unit aganst all but the biggest and baddest of carbs.

A.j.

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I totally agree, head to head a tbi built engine and a carb engine with both the same mods and size setup next to eachother on a dyno jet would prove the tbi unit to be far superior, but like you said its just a farm rig right? and what some one else said if all your going to do is drive it around your own property then there isnt really any point in dumping cash on afuel injection system, if the carb is crap replace it, if you want some more ponnies or atleast the ablility to make em upgrade...

-Dustin

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My LUV - R.I.P. 1979-2009, you will not be forgotten...

Fuel mileage doesn't payoff either way over a lot of miles. Performance is not that much better either way. Tuned port is a lot different in cost. That is what the later performance cars run. Even TB the big thing is the wiring and sensors. If that is not a problem then it might be worth the effort. MEGASQUIRT EFI could be used for TB, it could be used with a tuned port setup but it is a batch injection.

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75 Luv, 350 V8, TH350, Camaro rearend. New 1975 Luv Step side. Stock for now.
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